Well this is creepy and awesome. And made of win. It's something about Evil!L and innoecent children's songs, I think. Have I ever mentioned how much I like the idea of refering to the Whammy's kids by number? It has just the right amout of distance to the story.

I like the idea of L being able to just...move on and get rid of entire generations or 'flocks'.

The only thing I would change or emblish is probably here-

"One by one more of her men fell to the poison."

- and use that to add in a line about the helplessness of not being to be able to act on the knowledge, having to watch the men die without consequence. But that's just me.

All in all, it's very dark and very good and I'm sligtly disturbed that L wants his own sucesors dead, even if I can understand is betrayal-issues.